@emch it use to be the biggest. But I think there is a king out now. And I have a yellow green one I got a piece of from my mom a couple years ago and it’s leaves get just as big or bigger then the empress wu.
And boy is it supposed to get big! I put 2 (not this kind) in a front bed, then got to reading on them. Neither will fit where I put them when gull grown! One supposed to get 50 inches across and the other 36 inches!